19/03/2020 Approximations and Estimations(Study by Topics Junior Class) 19/03/2020 0Comments by Gate Academy Welcome to your Approximations and Estimations(Study by Topics Junior Class) NAME EMAIL PHONE NUMBER 1. If in a month Nigeria export 2.25 million barrels of petrol per day. If 1 barrel costs $98.50. How much to 3 s.f will be realised in a year (365 days) $78,663,893,000 $75,000,000,000 $80,000,000,000 $78,000,000,000 2. A chicken farmer collected 412 eggs in March and 596 in April. How many more eggs were collected in April? Round your numbers to the nearest 10. 180 eggs 380 eggs 80 eggs 980 eggs 3. Correct 0.3748 to two significant figures. 0.39 0.38 0.30 0.37 0.40 4. Find the estimated answers of the equation :98.51 ÷ 25.4 4 3.88 3 4.56 5. The area of a rectangle is 65.69 cm², estimate the perimeter of the rectangle 32 cm 35.78 cm 34 cm 30 cm 6. Express 0.4563948 to three decimal places. 0.457 0.4 0.456 0.5 7. Approximate 0.4059 to 3 significant figures. 0.406 0.4 0.41 0.40 0.405 8. Calculate the approximate cost of 15 mobile phones at $102.99 each $1566.98 $1500.00 $1544.85 $1496.86 9. Approximate 0.4059 to 2 significant figures. 0.405 0.406 0.40 0.4 0.41 10. A price of unleaded petrol is N97 per litre. A company buys 692 litres, calculate the estimated amount N68,000 N70,000 N65,000 N67,124 11. Round off 0.004365 correct to 2 significant figures. 0.004 0.0044 0.00437 0.0043 0.44 12. Round off 2.6548 correct to one decimal place. 2.65 2.66 2.7 3 2.6 13. Find the estimated answer by rounding each number in to 1 sf 0.214 0.138 0.327 0.175 14. In order to take his family to a show, Sergio will have to purchase 2 adult tickets and 3 child tickets. Given that an adult ticket costs £32.60 and a child ticket costs £17.50, work out an estimate for how much it will cost Sergio to take his whole family to this show. 80 120 70 100 15. Round to the nearest hundredths place:9,765.248 9,800 9,765.24 9,765.25 9,700 16. The difference between 0.003286 correct to three significant figures and 0.003286 correct to four decimal places is 0.00009 0.0003 0.00001 0.000004 17. Write 0.3741 to 2 decimal places 0.42 0.37 0.4 0.374 18. Express 9126 to the nearest thousand. 10000 9000 91000 9100 9120 19. Find an estimate for √98 7.4 10 9.2 6 20. Round to the nearest thousands place:7,803,422.397 7,820,000 8,803,000 7,805,000 7,803,000 1 out of 20 Time is Up! Time's up